<template>
  <div>
    <!--面包屑导航区-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!--卡片视图区域-->
    <el-card>
      <!--添加角色按钮区域-->
      <el-row>
        <el-col>
          <el-button type="primary" @click="RolesDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>
      <!--角色列表-->
      <el-table
          :data="roleList"
          border stripe>
        <!--展开列-->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
                v-for="(item1, index1) in scope.row.children"
                :key="item1.id"
                :class="['bdbottom',index1 === 0? 'bdtop' : '','vcenter']">
              <!--渲染一级权限-->
              <el-col :span="5">
                <el-tag closable
                        @close="removeRightById(scope.row,item1.id)">{{ item1.authName }}
                </el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!--渲染二级和三级权限-->
              <el-col :span="19">
                <!--通过 for 循环渲染二级权限-->
                <el-row v-for="(item2, index2) in item1.children"
                        :key="item2.id"
                        :class="[index2 === 0? '' : 'bdtop','vcenter']">
                  <el-col :span="6">
                    <el-tag type="success"
                            closable
                            @close="removeRightById(scope.row,item2.id)">{{ item2.authName }}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag v-for="item3 in item2.children"
                            :key="item3.id"
                            type="warning"
                            closable
                            @close="removeRightById(scope.row,item3.id)">
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>-->
            <!--  &lt;!&ndash;{{ scope.row }}&ndash;&gt;-->
            <!--   </pre>-->
          </template>
        </el-table-column>
        <!--索引列-->
        <el-table-column type="index" label="序号" align="center" width="50"></el-table-column>
        <el-table-column label="角色名称" prop="roleName" align="center"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc" align="center"></el-table-column>
        <el-table-column label="操作" align="center" width="300">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)">编辑
            </el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeRolesById(scope.row.id)">删除
            </el-button>
            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限
            </el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!--添加角色的对话框-->
    <el-dialog
        title="添加角色"
        :visible.sync="RolesDialogVisible"
        width="50%"
        @close="RolesDialogClosed">
      <!--内容主体区域-->
      <el-form :model="RolesForm" :rules="RolesFormRules" ref="RolesFormRef" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="RolesForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="RolesForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!--底部区域-->
      <span slot="footer" class="dialog-footer">
    <el-button @click="RolesDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="addRoles">确 定</el-button>
  </span>
    </el-dialog>

    <!--修改角色的对话框-->
    <el-dialog
        title="修改角色"
        :visible.sync="editDialogVisible"
        width="60%"
        @close="editRolesDialogClosed">
      <el-form :model="editForm" :rules="editRolesFormRules" ref="editRolesFormRef" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
    <el-button @click="editDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="editRolesInfo">确 定</el-button>
  </span>
    </el-dialog>

    <!--分配权限的对话框-->
    <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="50%"
        @close="setRightDialogClosed">
      <!--树形控件-->
      <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id"
               default-expand-all :default-checked-keys="defKeys" ref="treeRef">
      </el-tree>
      <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: "Roles",
  data() {
    return {
      //所有角色列表数据
      roleList: [],
      //控制添加角色对话框的显示与隐藏
      RolesDialogVisible: false,
      //添加角色的表单数据
      RolesForm: {
        roleName: '',
        roleDesc: '',
      },
      //添加表单验证规则对象
      RolesFormRules: {
        roleName: [{required: true, message: '请输入角色名称', trigger: 'blur'}],
        roleDesc: [{required: true, message: '请输入角色描述', trigger: 'blur'}]
      },
      //控制修改角色对话框的显示与隐藏
      editDialogVisible: false,
      //查询到角色信息对象
      editForm: {},
      //修改角色信息的验证规则对象
      editRolesFormRules: {
        roleName: [{required: true, message: '请输入角色名称', trigger: 'blur'}],
        roleDesc: [{required: true, message: '请输入角色描述', trigger: 'blur'}]
      },
      //控制分配权限对话框的显示和隐藏
      setRightDialogVisible: false,
      //所有权限的数据
      rightsList: [],
      //树形控件的属性绑定对象
      treeProps: {
        children: 'children',
        label: 'authName'
      },
      //默认选中的节点ID值数组
      defKeys: [],
      //当前即将分配权限的ID
      roleId: '',
    }
  },
  created() {
    this.getRolesList();
  },
  methods: {
    //获取所有角色的列表
    async getRolesList() {
      const {data: res} = await this.$axios.get('roles')
      // console.log(res);
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败!')
      }
      this.roleList = res.data;
      // console.log(this.roleList);
    },
    //监听添加角色对话框的关闭事件
    RolesDialogClosed() {
      this.$refs.RolesFormRef.resetFields();
      //resetFields()对该表单项进行重置，将其值重置为初始值并移除校验结果
    },
    //点击按钮，添加新角色
    addRoles() {
      this.$refs.RolesFormRef.validate(async valid => {
        // console.log(valid);
        if (!valid) return
        //可以发起添加角色的网络请求
        const {data: res} = await this.$axios.post('roles', this.RolesForm)
        if (res.meta.status !== 201) {
          this.$message.error('添加角色失败!')
        }
        this.$message.success('添加角色成功!')
        //隐藏添加角色的对话框
        this.RolesDialogVisible = false
        //重新获取角色列表
        this.getRolesList();
      })
    },
    //展示编辑角色的对话框
    async showEditDialog(id) {
      // console.log(id);
      const {data: res} = await this.$axios.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询角色失败！')
      }
      this.editForm = res.data;
      this.editDialogVisible = true;
    },
    //监听修改角色对话框关闭事件
    editRolesDialogClosed() {
      this.$refs.editRolesFormRef.resetFields();
    },
    //修改角色并提交
    editRolesInfo() {
      this.$refs.editRolesFormRef.validate(async valid => {
        // console.log(valid);
        if (!valid) return
        //发起修改角色的数据请求
        const {data: res} = await this.$axios.put('roles/' + this.editForm.roleId,
            {roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc})
        // console.log(res);
        if (res.meta.status !== 200) {
          this.$message.error('更新角色失败!')
        }
        // 关闭更改角色的对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getRolesList()
        // 提示角色修改成功
        this.$message.success('更新角色成功!')
      })
    },
    //根据ID删除对应的角色信息
    async removeRolesById(id) {
      // console.log(id);
      //弹框询问是否删除数据
      const confirmResult = await this.$confirm('此操作将永久删除该角色, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      // console.log(confirmResult);
      //如果用户确认删除，则返回值为字符串confirm
      //如果用户取消删除，则返回值为字符串cancel
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除');
      }
      const {data: res} = await this.$axios.delete('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('删除角色失败！')
      }
      this.$message.success('删除角色成功！')
      this.getRolesList();

    },
    //根据ID删除对应的权限
    async removeRightById(role, rightId) {
      //弹框提示用户是否要删除
      const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err);

      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除');
      }
      const {data: res} = await this.$axios.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      // this.getRolesList();
      role.children = res.data;
    },
    //展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      //获取权限的数据
      const {data: res} = await this.$axios.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }
      //获取到的权限数据保存到 data 中
      this.rightsList = res.data
      // console.log(this.rightsList)

      //递归获取三级节点的ID
      this.getLeafKeys(role, this.defKeys);
      this.setRightDialogVisible = true
    },
    //通过递归的形式，获取角色下所有三级权限的id  并保存到 defKeys数组中
    getLeafKeys(node, arr) {
      //如果当前节点不包含 children属性，则说明该node节点是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    //监听分配权限对话框的关闭事件
    setRightDialogClosed() {
      this.defKeys = []
    },
    //点击分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys(),
      ]
      // console.log(keys);
      const idStr = keys.join(',');
      const {data: res} = await this.$axios.post(`roles/${this.roleId}/rights`, {rids: idStr})
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败!')
      }
      this.$message.success('分配权限成功!')
      this.getRolesList();
      this.setRightDialogVisible = false
    },
  }
}
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}

.bdtop {
  border-top: 1px solid #eeeeee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>